Process for augmenting or enhancing the aroma or taste of a peppermint oil based oral hygiene flavor by adding thereto methyl substituted oxobicyclo-4,4,0-decane derivatives

ABSTRACT

Described is the use of compounds defined according to the generic structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein X represents the moieties: ##STR2## wherein R 1 , R 2 , R 3  and R 4  represent hydrogen or methyl with the proviso that (i) at least three of R 1 , R 2 , R 3  and R 4  represent hydrogen and (ii) when the dashed line is a carbon-carbon single bond and X is: ##STR3## then one of R 1 , R 2 , R 3  or R 4  is methyl and the other represents hydrogen; wherein R 5  represents hydrogen, and uses thereof for their organoleptic properties in augmenting or enhancing the aroma or taste of peppermint oil based oral hygiene flavors.

This application is a divisional of application for U.S. Ser. No. 182,451 filed on Aug. 28, 1980, now U.S. Pat. No. 4,320,772 issued on Mar. 23, 1982.

BACKGROUND OF THE INVENTION

The instant invention covers compounds having the generic structure: ##STR4## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein X represents the moieties: ##STR5## wherein R₁, R₂, R₃ and R₄ represent hydrogen or methyl with the provisos that (i) at least three of R₁, R₂, R₃ and R₄ represent hydrogen and (ii) when the dashed line is a carbon-carbon single bond and X is: ##STR6## then one of R₁, R₂, R₃ or R₄ is methyl and the other represents hydrogen; wherein R₅ represents hydrogen, MgX, MgR₇, CdR₇, ZnR₇, Na, K or Li; wherein X represents Chloro, Bromo or Iodo; wherein R₆ represents hydrogen or methyl; and wherein R₇ represents lower alkyl; as well as uses of the above compounds, with the exception of the organometallic compounds of the genus, for augmenting or enhancing the aromas and/or taste of consumable materials.

Materials which can provide minty, camphoraceous, dry woody, sweet, fruity, woody patchouli, green, herbaceous, basil-like, citrus-like, bergamot-like, lime-like, grapefruit-like, peppery, precious-woody, vertiver-like, fresh, musky, lavender thyme, rosemary, sweaty, rooty and earthy aromas with floral, citrus, lavender and amber top-notes and backgrounds are known in the art of perfumery. Many of the natural materials which provide such fragrances and contribute desired nuances to perfumery compositions are high in cost, vary in quality from one batch to another and/or are generally subject to the ususal variations of natural products.

By the same token, materials which can provide oriental, insence-like, peppery, blueberry-like, eucalyptol-like, minty, camphoraceous, floral, musk-like, rose-like, black pepper, spicey, patchouli, cooling, sandalwood-like, woody and walnut-like aromas with oriental, black pepper, peppery, minty, eucalyptol-like, camphoraceous, floral, rosey and patchouli-like tastes are well known in the art of flavoring for foodstuffs, toothpastes, chewing gums and medicinal products. Many of the natural materials which provide such flavor nuances and contribute desired nuances to flavor and compositions are high in cost, vary in quality from one batch to another and/or are generally subject to the usual variations of natural products.

Sweet, fruity, berry-like, cooling, woody and floral aroma and taste nuances are known in the art of the production of smoking tobaccos and smoking tobacco articles. Many of the natural materials which provide such aroma and taste nuances to smoking tobacco compositions are high in cost, vary in quality from one batch to another and/or are generally subject to the usual variations of natural products.

There is, accordingly, a continuing effort to find synthetic materials which will replace, enhance or augment the essential flavor and/or fragrance notes provided by natural essential oils or compositions thereof. Unfortunately, many of these synthetic materials either have the desired nuances only to a relatively small degree or else contribute undesirable or unwanted odor to the consumable compositions. The search for materials which can provide more refined patchouli-like aromas, for example, have been difficult and relatively costly in the areas of both natural products and synthetic products.

Artificial flavoring agents for foodstuffs have received increasing attention in recent years. For many years such food flavoring agents have been preferred over natural flavoring agents at least in part due to their diminished cost and their reproducible flavor qualities. For example, natural food flavoring agents such as extracts, concentrates and the like are often subject to wide variations due to changes in quality, type and treatment of the raw materials. Such variations can be reflected in the end products and result in unfavorable flavor characteristics in said end product. Additionally, the presence of the natural product in the ultimate food may be undesirable because of increased tendency to spoil. This is particularly troublesome in food and food uses where such products as dips, soups, chips, sausages, gravies and the like are apt to be stored prior to use.

The fundamental problem in creating artificial flavor agents is that the artificial flavor to be achieved be as natural as possible. This generally proves to be a difficult task since the mechanism for flavor development in many foods, medicinal products, chewing gums and toothpastes is not completely known. This is noticable in products having licorice, citrusy and vegetable flavor characteristics particularly.

Even more desirable are products that can serve to substitute for difficult-to-obtain natural perfumery oils and at the same time substitute for natural flavoring ingredients in foodstuffs, chewing gums, medicinal products, toothpastes, and smoking tobaccos.

Oxobicyclo compounds are known in the prior art. Thus, Nagakura, et al, Bull. Chem. Soc. Japan Vol. 48(10), 2995-6 (October 1975) discloses the compound defined according to the generic structure: ##STR7## produced by the reaction: ##STR8## wherein one of R₁ ', R₂ ', R₃ ' or R₄ ' is methyl and the others represent hydrogen. In addition, Conia and Rouessac, Bull. Soc. Chem. France 1953 (page 1925 et. seq.) discloses processes for producing oxobicyclo compounds according to the following reaction steps: ##STR9##

The use of oxotricyclic derivatives in perfumery is disclosed in U.S. Pat. No. 3,996,169, issued on Dec. 7, 1976. Thus, in U.S. Pat. No. 3,996,169, a genus defined according to the structure: ##STR10## is disclosed, wherein R₁, R₂, R₃, R₄, R₅, R₆, R₇, R₈, R₉ and R₁₀ is selected from the group consisting of hydrogen and methyl; and wherein the dashed line may be a carbon-carbon single bond or a carbon-carbon double bond. Members of this genus are indicated to be capable of altering, modifying, enhancing or emparting an aroma of or to consumable materials including colognes, perfumes and perfumed articles and such an aroma is of a patchouli type.

Arctander, "Perfume and Flavor Chemicals", 1969, Vol. 1 discloses the use in perfume compositions and foodstuff flavors of "decalinol", "decalone", "fenchone", and "fenchyl alcohol", thusly:

"(i) 1385: FENCHONE laevo-Fenchone. (dextro- is known but less common as a fragrance material).

1,3,3-Trimethyl-2-norbornanone.

1,3,3-Trimethyl bicyclo-1,2,2-heptone-2. ##STR11## Warm-camphoraceous, powerful and diffusive, basically sweet odor. Warm, somewhat burning and bitter taste with a medicinal note.

This ketone finds some use as a masking odor in industrial fragrances. It is also used in the reconstruction of Fennel oil and a few other essential oils.

In spite of its rather unpleasant taste, it is used in various Berry complex flavors, in Spice complexes and in certain types of Liquer flavoring.

The concentration used is about 0.1 to 5 ppm in the finished product.

(ii) 1387: FENCHYL ALCOHOL

1,3,3-Trimethyl-2-norbornanol.

1,3,3-Trimethyl bicyclo-1,2,2-heptanol-2.

2-Fenchanol.

Fenchol. ##STR12## The racemic alpha-Fenchol has a somewhat lower melting point, and the beta-Fenchols are all liquid at room temperature.

Fenchol made by reduction of Fenchone from Cedar-leaf oil is usually a mixture of several isomers, including the crystalline alpha-isomers. The beta-isomer forms a crystalline Hydrate which may be solid at room temperature.

Almost insoluble in water, soluble in alcohol, miscible with oils. Powerful and diffusive, Camphor-like, but sweeter and more Citrus-like almost Lime-like odor with more or less of an earthy-dry character, according to the composition and isomer-ratio.

The taste is somewhat bitter-Lime-like, camphoraceous and slightly woody-musty.

This interesting alcohol (or mixed alcohols) finds use in perfume compositions ranging from woody or herbaceous to Citrus-Lime and even certain floral types. It produces power and `lift` to floral fragrances, and solid background to Lime and other Citrus bases, having the advantage over the Terpenes in being very stable in soap.

Fenchyl alcohol is also used in flavor compositions such as Strawberry and other berries, Lime and Spice, etc.

The concentration is normally low, e.g. 0.2 up to 5 ppm in the finished product.

(iii) 824: TRANS-DECAHYDRO-BETA-NAPHTHOL

trans-beta-Decanol. (sometimes called "Decalinol".)

Bicyclo-4,4,0-Decanol. ##STR13## Colorless viscous liquid, solidifying in the cold to an opaque mass. The presence of variable amounts of the cis-isomer is mainly responsible for the variations in physical appearance of this material.

Mild, sweet, slightly camphoraceous-woody, also warm and mildly spicy odor of fair tenacity. The odor has been compared to that of Dihydrocarveol, but such description does not help many perfumers.

Practically insoluble in water, soluble in alcohol and oils.

This alcohol has been used, and is still used on a modest scale, in perfume compositions, mostly in connection with woody and camphoraceous fragrance types, including the Ionones, Cyclohexylderivatives, etc. Several of its esters (see following monographs) have been more successful as perfume materials).

However, since the Ambregis- and Sandalwood-notes, which are represented to a certain degree in the esters, can be obtained with much superior beauty by way of modern perfume chemicals, there is reason to believe that the Decahydronaphthyl series will eventually become obsolete.

Prod.: by catalytic hydrogenation of beta-Naphthol. The reaction yields a mixture of cis- and trans-isomers, but the perfumers generally prefer the trans-isomer or a material primarily consisting of that isomer.

(iv) 830: BETA-DECALONE

Decahydro naphthalone The commercial products consist of a mixture of cis- and trans-isomers. ##STR14## Viscous colorless liquid, solidifying in the cold. Practically insoluble in water, soluble in alcohol and oils.

The cis-isomer is liquid and boils at 247° C.

The trans-isomer is solid below 6° C. and boils at 241° C.

Semi-dry, tenacious odor resembling part of the Ambregris-picture, also woody, remotely reminiscent of Sandalwood. Odor variations are observed in materials from different sources of supply.

This ketone has found a little use in perfume compositions, including soap perfumes, where it can introduce pleasant background notes in support of Musk Ambrette, Labdanum, Methylionones, etc.

Recent development in Ambregris chemicals has brought much superior materials in the hands of the perfumer, and it is very likely that the title material, and many of its relatives, will become obsolete within the next decade or so.

Prod.: by oxidation of beta-Decalol with Chromic acid mixture."

U.S. Pat. No. 3,932,515 discloses the use of the compound having the structure: ##STR15## in perfumery and specifically indicates that such compound has a woody aroma of high tenacity. U.S. Pat. No. 3,932,516 discloses the compound having the structure: ##STR16## and indicates that this compound is useful in perfumery due to its woody character.

None of the references cited above, or for that matter any other references discloses compounds which have a close structural relationship to the genus of compounds of the instant invention. In any event, the organoleptic properties of the compounds of the references are different in kind from those of the compounds of the instant invention.

THE INVENTION

It has now been discovered that novel solid and liquid foodstuff, chewing gum, medicinal product and toothpaste compositions and flavoring compositions therefor having oriental, incense-like, peppery, blueberry-like, eucalyptol-like, minty, camphoraceous, floral, musk-like, rose-like, black pepper, spicey, patchouli, cooling, sandalwood-like, woody and walnut-like aromas with oriental, black pepper-like, peppery minty, eucalyptol-like, camphoraceous, floral, rosey and patchouli-like tastes; as well as novel smoking tobacco and smoking tobacco flavoring compositions having sweet, fruity, berry-like, cooling, woody and floral aromas prior to smoking and on smoking in both the mainstream and the sidestream; as well as novel perfume compositions, colognes and preferred articles (e.g. solid or liquid anionic, cationic, nonionic and zwitterionic detergents, fabric softener compositions, cosmetic powders and prior-added fabric softener articles) having intense and pleasant minty, camphoraceous, dry woody, sweet fruity, patchouli, woody patchouli, green, herbaceous, basil-like, citrus-like, bergamot-like, lime-like, grapefruit-like, peppery, precious woody, vetiver, fresh musky, lavender, thyme, rosemary, sweaty, rooty and earthy aromas with floral, citrus, lavender, and amber-like top-notes and undertones may be provided by the utilization of one or more methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention having the generic structure: ##STR17## wherein X is a moiety which is either: ##STR18## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond; wherein R₁, R₂, R₃ and R₄ represent hydrogen or methyl with the provisos (i) that at least three of R₁, R₂, R₃ and R₄ represent hydrogen and the other of R₁, R₂ R₃ and R₄ is methyl and (ii) that when the dashed line is a carbon-carbon single bond and X is the moiety: ##STR19## then one of R₁, R₂, R₃ or R₄ is methyl and the other of R₁, R₂, R₃ or R₄ is hydrogen; wherein R₅ represents hydrogen and R₆ represents hydrogen or methyl in foodstuffs, chewing gums, toothpastes, medicinal products, perfume compositions, perfumed articles, colognes and smoking tobaccos as well as smoking tobacco substitutes.

Unless otherwise specified, representations herein of organic structures are intended to indicate a "cis" isomer a "trans" isomer, or a mixture of "cis" and "trans" isomers with respect to the plane of the cyclohexane or the cyclohexene ring. Thus, the generic structure: ##STR20## may either be a "cis" isomer, for example, having the structure: ##STR21## or a "trans" isomer having the structure: ##STR22##

Furthermore, the "trans" structure: ##STR23## with respect to the methyl moiety at the "-9, 10-" position may further be specified, for example, by the structure: ##STR24## wherein X is ##STR25##

The methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention may be prepared by first reacting 2,6,6-trimethylcyclohex-2-enone with a substituted butadiene such as butadiene, isoprene or piperylene according to the reaction: ##STR26## The ratio of diene:ketone may be in the range of from about 1:1 (mole ratio) up to about 10:1 with a mole ratio of diene:ketone preferably being about 1.5:1. The reaction may be carried out in the presence of a Lewis acid catalyst such as aluminum thrichloride, zinc chloride, titanium tetrachloride, BF₃.etherate, ethyl aluminum dichloride, diethyl aluminum chloride, and other Lewis acid catalysts. Reaction may be carried out in the presence of or in the absence of a solvent. When using a solvent, solvents such as toluene, xylene and chlorinated solvents may be used which are inert to the reactants.

The reaction may be carried out at the temperatures of between -15° C. and 100° C.; preferably at -10° C. up to about 50° C. The reaction may be carried out at atmospheric pressure, super atmospheric pressures and subatmospheric pressures. Most conveniently, economically and preferably the reaction is carried out at atmospheric pressure.

The resulting ketone may be used as is for its organoleptic properties, in which case, the resulting ketone is purified as by standard extraction and fractional distillation processes. The isomers resulting may be commercially separated as by means of high pressure liquid chromatography.

The resulting ketone may, however, be further reacted either (i) by means of a reduction reaction to form a saturated ketone according to the reaction: ##STR27## or (ii) by reduction of the ketone moiety to form an alcohol by means of the reaction: ##STR28## or (iii) by means of reaction with an organometallic compound such as a Grignard reagent followed by subsequent hydrolysis whereby the 1-methyl-1-hydroxy derivative is formed according to the reaction scheme: ##STR29## wherein M is either of MgX, Na, K, Li, Cd, Mg or Zn; wherein X is chloro, bromo or iodo; wherein R₇ is lower alkyl; wherein when M is Cd, Mg or Zn, n=1 and when M is MgX, Na, K or Li, n=0. The resulting unsaturated alcohol may further be reduced as by hydrogenation, for example, according to the reaction: ##STR30##

When a hydrogenation reaction is carried out, e.g.: ##STR31## a hydrogenation catalyst is used, for example, a palladium catalyst or a palladium-on-carbon catalyst whereby a saturated ketone is formed. The hydrogenation is preferably carried out at temperatures in the range of from about 20° C. up to about 100° C. at pressures of between about 30 psig and about 300 psig; preferably at pressures of between 40 psig and 60 psig. At the end of the hydrogenation, the resulting ketone may be used for its organoleptic properties in which case the resulting ketone is purified by means of standard extraction procedures and standard fractional distillation procedures. In the event that two or more isomers are formed as a result of the reaction, the resulting isomers may be separated as by means of fractional distillation or even by means of high pressure liquid chromatography.

When the ketone moiety is reduced to the alcohol as by means of the reaction: ##STR32## this reaction takes place using a reducing agent such as lithium aluminum hydride, sodium boro hydride, lithium borohydride. Al(isobutyl)₂ H or "Vitride®" which is NaAlH₂ (OCH₂ CH₂ OCH₃)₂. However, the ketone moiety may be reduced to the alcohol moiety by means of high pressure and high temperature hydrogenation, e.g. carrying out a hydrogenation at about 90°-150° C. at pressure of between 50 and 5,000 psig. The higher pressure and higher temperature range will give rise to shorter reaction time.

The resulting ketone may be used as is or may be further reacted with an organometallic compound which is subsequently hydrolyzed. Thus, in the resulting ketone is to be used "as is" for its organoleptic properties, said ketone will be further "workup" as by means of standard extraction procedures and/or fractional distillation procedures. In the event that pure isomers are desired and indeed pure stereoisomers are desired, high pressure liquid chromotographic techniques may be used as well as standard stereoisomer-separation techniques using pure stereoisomers which will react with a functional group followed by decomposition after fractional crystallization, for example.

When the resulting ketone is reacted with an organometallic compound to form a second organometallic compound which is subsequently hydrolized according to the reaction procedure: ##STR33##

In the reaction of the oxabicyclic ketone with the organometallic compound having the structure:

    CH.sub.3 --M(R.sub.7).sub.n

it is preferred that the compound having the structure:

    CH.sub.3 --M(R.sub.7).sub.n

be reacted in an appropriate solvent such as benzene, benzene/tetrahydrofuran, tetrahydrofuran or diethyl ether. It is also preferred that the mole ratio of organometallic compound having the structure:

    CH.sub.3 --M(R.sub.7).sub.n :Ketone

be about 1:1. It is further preferred that the reaction temperature be from about -5° C. up to about 40° C. with the most preferred temperatures being 20° C.-30° C.

The hydrolysis of the organometallic compound to form the resulting alcohol is carried out using a mineral acid such as dilute aqueous hydrochloric acid, sulfuric acid or phosphoric acid or other protonic acids such as paratoluenesulfonic acid. The hydrolysis preferably takes place at 0°-20° C. At the end of this reaction, the reaction product is isolated by means of standard isolation techniques such as fractional distillation and, if desired, preparative GLC or high pressure GLC for isolation of the end product.

An alternative method for preparing unsaturated alcohols of our invention is to react the ketones resulting from the Diels-Alder reaction with isopropyl magnisium halide. In view of the sterically hindered position of the ketone (as a result of the methyl groups "alpha" to the ketone moity), an oxygrignard is formed from the ketone without alkylation at the ketone moity. The resulting oxygrignard may then be hydrolized using standard hydrolisis conditions as set forth above to yield the resulting alcohol. The reaction illustrating this procedure is set forth as follows: ##STR34##

Specific examples of compounds produced according to the foregoing process are set forth in Table I below:

                                      TABLE I                                      __________________________________________________________________________                                             Smoking                                Structure of Name of  Perfumery                                                                               Flavor   Tobacco                                Compound     Compound Evaluation                                                                              Evaluation                                                                              Evaluation                             __________________________________________________________________________      ##STR35##   3,4,4A,5,8,8A- Hexahydro-2,2, 8A-trimethyl- 1(2H)-naphtha-                     lenone (major- ity: "cis" isomer).                                                      Minty, campho- raceous, dry woody with floral                                  citrus background.                                                                      An oriental incense, peppery aroma with an                                     n oriental and peppery flavor characteristi                                    c at 1 ppm.                                      ##STR36##   Octahydro-2,2, 8A-trimethyl- 1(2H)-naphtha- lenone.                                     A sweet, frui- ty, minty camphoraceous aroma with a                            oody patchouli undertone flavor charac- teristic.                                       A blueberry-like, oriental, minty,                                             camphoraceous eucalyptol-like aroma                                            character with a camphora- ceous,                                              oriental, minty, eucalyp- tol flavor                                           characteristic at 2ppm making it useful                                        for oral hygiene and cough                                                              A sweet, woody, citrusy aroma                                                  with cooling nuances prior to and                                              on smoking in the main- stream                                                 and in the side- stream.                ##STR37##   3,4,4A,5,8,8A- Hexahydro-2,2- 5,6(and 7), 8A-tetramethyl-                      1(2H)-naphtha- lenone (major- ity: "cis" isomer).                                       A green, her- baceous aroma with a lavender                                    top-note and a basil/citrus undertone                                          with bergamot-like nuances.                                                             A sweet, floral, musk-like, fresh rosey                                        aroma with a floral rosey flavor charac-                                       teristic at 0.2 ppm, causing it to be                                          useful in rose and raspberry flavors.            ##STR38##   Octahydro-2,2, 6(and 7), 8A  tetramethyl- 1(2H)-naphtha-                       lenone (Major- ity: "cis" isomer).                                                      A peppery dry woody aroma with a precious woody                                back- ground and vetiver-like and                                                       An oriental black pepper- like, spicey                                         aroma with a black pepper flavor charac-                                       teristic at 1 ppm, causing it to be use-                                       ful in black pepper flavors.                     ##STR39##   1,2,3,4,4A,5,8, 8A-Octahydro-2, 2,6(& 7), 8A- tetrahydro-1-                    naphthol (Majority: "cis"isomer).                                                       A citrus (lime) aroma with dry woody and patchouli                             undertones.                                                                             A citrus, fresh, musky, floral aroma with                                      a perfu- mery flavor characteristics at                                        0.1 ppm.                                         ##STR40##   3,4,4A,5,8,8A- Hexahydro-2,2, 8(and 5),8A- tetramethyl-                        1(2H)-naphtha- lenone (Major- ity: "cis" isomer).                                       A rich herba- ceous, lavander, thyme/rosemary aroma                            which becomes sweaty on dry out.                                                        A floral, oriental, patchouli-like,                                            camphoraceous, incense-like aroma charac-                                      teristic with an oriental, patchouli,                                          camphoraceous flavor profile at 2                                                       A sweet fruity, berry, cooling,                                                woody, floral aroma both prior to                                              and on smoking in the main stream                                              and in the side stream.                 ##STR41##   1,2,3,4,4A,5,8, 8A-Octahydro-2, 2,8A-trimethyl- 1-naphthol.                             A patchouli, woody, campho- raceous aroma with a                               borneol- like undertone.                                                                A patchouli, camphoraceous, earthy aroma                                       characteristic with a patchouli, camphorace                                    ous, earthy flavor characteristic at 1                                         ppm.     A sweet, woody, veti- ver-like                                                 aroma and taste, both prior to                                                 and on smoking in the main-                                                    stream and the side- stream.            ##STR42##   1,2,3,4,4A,5,8, 8A-Octahydro-2, 2,8(and 5), 8A- tetramethyl-                   -naphthol.                                                                              An intense patchouli- like aroma with a woody                                  background.                                                                             An oriental ionone-like, minty, eucalyp-                                       tus, cooling aroma with an oriental flavor                                     haracteristic at 1 ppm                                                                  A woody, patchouli- like, orien-                                               tal-like aroma both to and on                                                  smoking causing virginia- like                                                 tobacco to attain a turkish                                                    tobacco aroma and taste                 ##STR43##   2,2,6(and 7), 8A-tetramethyl- 1-naphthol                                                Sandalwood, patchouli-like aroma with incense-like                             undertones.                                                                             A sandalwood, patchouli, incense, ionce                                        and eucalyptol aroma charac- ter with                                          incense flavor characteristics at 1 ppm.         ##STR44##   Decahydro-2,2, 8A-trimethyl- 1-naphthol                                                 An earthy, camphoraceous, woody, borneol- like,                                patchouli  aroma with precious, woody undertones.                                       A minty, euca- lyptol-like, woody aroma                                        characteristic with minty eucalyptol-                                          like, woody and bitter flavor charac-                                          teristics at 0.1 ppm causing it to be                                          useful for oral hygiene flavors.                 ##STR45##   Octahydro-2,2, 8,8A-tetra- methyl-1(2H)- naphthalenone                                  An earthy, camphoraceous, woody, borneol- like,                                patchouli aroma with precious, woody undertones                                         A minty, euca- lyptol-like woody aroma                                         characteristic with minty eucalyptol-                                          like, woody and bitter flavor charac-                                          teristics at 0.1 ppm causing it to be                                          useful for oral hygiene flavors                                                         A sweet woody aroma and taste                                                  both prior to and on smoking.           ##STR46##   1,2,3,4,4A,5,8, 8A-Octahydro-1, 2,2,8A-tetra- methyl-1-naph-                   hol.     A camphorace- ous/borneol, earthy, rooty, woody                                aroma with a patchouli background.                                                      An earthy, patchouli, oriental, walnut-like                                     aroma with an earthy patchouli oriental                                       walnut flavor characteris- tic causing it                                      to be useful in walnut fla- vors, at a                                         concentra- tion of 0.002                                                                A sweeet, woody, veti- ver-like                                                aroma and taste both prior to and                                              on smoking in the main- stream                                                 and the side- stream.                   ##STR47##   1,2,3,4,4A,5,8, 8A-Octahydro-1,  2,2,6(and                                     7), 8A-pentamethyl- 1-naphthol (Majority: "cis" isomer).                                A dry woody, rooty, patchou- li aroma                                          with camphoraceous and borneol undertones.                                              A patchouli, oriental and earthy aroma                                         characteris- tic with a patchouli earthy                                       flavor characteris- tic making it useful                                       for walnut flavors at 1 ppm                      ##STR48##   1,2,3,4,4A,5,8, 8A-Octahydro-1, 2,2,8(and 5), 8A-pentamethyl-                   1-naphthol.                                                                            A patchouli aroma with minty top- notes.                                                An oriental, ionone-like, minty, euca-                                         lyptol-like, patchouli-like aroma with a                                       patchouli-like flavor charac- teristic at                                      1 ppm    A woody, patchouli- like aroma                                                 and taste both prior to and on                                                 smoking  yielding a cigar-type                                                 taste in the main- stream and the                                              side- stream.                           ##STR49##   Decahydro-1,2, 2,8A-tetra- methyl-1-naph- thol.                                         A patchouli aroma with minty top- notes.                                                An oriental ionone-like, minty, euca-                                          lyptol-like, patchouli-like aroma with a                                       patchouli-like flavor charac- teristic at                                      1 ppm.                                           ##STR50##   Decahydro-1,2, 2,8(and 5), 8A- pentamethyl- 1-naphthol                                                    A woody, camphoraceous, and                                                    patchouli- like aroma and taste                                                both prior to and on smoking with                                              woody, oriental notes  in the                                                  smoke flavor causing it to be                                                  use- ful in the production of                                                  Turkish tobac- co flavor, this                                                 material imparts a Turkish tobac-                                              o aroma and taste nuance to                                                    Virginia tobaccos in both the                                                  main- stream and the side-                                                     streams.                                ##STR51##   Decahydro-1,2, 2,6(and 7), 8A- pentamethyl- 1-naphthol.                                 An earthy, camphoreceous aroma with pathcouli                                  background.                                                                             A patchouli, camphoraceous aroma and                                           flavor pro- file at 2 ppm.                                                              A woody, patchouli- like aroma                                                 and taste both prior to and on                                                 smoking.                               __________________________________________________________________________

When the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention are used as food flavor adjuvants, the nature of the co-ingredients included with each of the said methyl substituted oxobicyclo-4,4,0-decane derivatives in formulating the product composition will also serve to alter, modify, augment or enhance the organoleptic characteristics of the ultimate foodstuff treated therewith.

As used herein in regard to flavors, the terms "alter", "modify" and "augment" in their various forms mean "supplying or imparting flavor character or note to otherwise bland, relatively tasteless substances or augmenting the existing flavor characteristic where a natural flavor is deficient in some regard or supplementing the existing flavor impression to modify its quality, character or taste".

The term "enhance" is used herein to mean the intensification of a flavor or aroma characteristic or note without the modification of the quality thereof. Thus, "enhancement" of a flavor or aroma means that the enhancement agent does not add any additional flavor note.

As used herein, the term "foodstuff" includes both solid and liquid ingestible materials which usually do, but need not, have nutritional value. Thus, foodstuffs, include soups, convenience foods, beverages, dairy products, candies, vegetables, cereals, soft drinks, snacks and the like.

As used herein, the term "medicinal product" includes both solids and liquids which are ingestible non-toxic materials which have medicinal value such as cough syrups, cough drops, aspirin and chewable medicinal tablets.

The term "chewing gum" is intended to means a composition which comprises a substantially water-insoluble, chewable plastic gum base such chicle, or substitutes therefor, including jelutong, guttakay, rubber or certain comestible natural or synthetic resins or waxes. Incorporated with the gum base in admixture therewith may be plasticizers or softening agents, e.g., glycerine; and a flavoring composition which incorporates one or more of the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention, and in addition, sweetening agents which may be sugars, including sucrose or dextrose and/or artificial sweeteners such as cyclamates or saccharin. Other optional ingredients may also be present.

Substances suitable for use herein as co-ingredients or flavoring adjuvants are well known in the art for such use, being extensively described in the relevant literature. It is a requirement that any such material be "ingestibly" acceptable and thus non-toxic and otherwise non-deleterious particularly from an organoleptic standpoint whereby the ultimate flavor and/or aroma of the consumable material used is not caused to have unacceptable aroma and taste nuances. Such materials may in general be characterized as flavoring adjuvants or vehicles comprising broadly stabilizers, thickeners, surface active agents, conditioners, other flavorants and flavor intensifiers.

Stabilizer compounds include preservatives, e.g., sodium chloride; antioxidants, e.g., calcium and sodium ascorbate, ascorbic acid, butylated hydroxyanisole (mixture of 2- and 3-tertiary-butyl-4-hydroxyanisole), butylated hydroxytoluene (2,6-di-tertiary-butyl-4-methylphenol), propyl gallate and the like and sequestrants, e.g., citric acid.

Thickener compounds include carriers, binders, protective colloids, suspending agents emulsifiers and the like, e.g., agar agar, carrageenan; cellulose and cellulose derivatives such as carboxymethyl cellulose and methyl cellulose; natural and synthetic gums such as gum arabic, gum tragacanth; gelatin, proteinaceous materials; lipids; carbohydrates; starches, pectines, and emulsifiers, e.g., mono- and diglycerides of fatty acids, skim milk powder, hexoses, pentoses, disaccharides, e.g., sucrose corn syrup and the like.

Surface active agents includes emulsifying agents, e.g., fatty acids such as capric acid, caprylic acid, palmitic acid, myristic acid and the like, mono- and diglycerides of fatty acids, lecithin, defoaming and flavor-dispersing agents such as sorbitan monostearate, potassium stearate, hydrogenated tallow alcohol and the like.

Conditioners include compounds such as bleaching and maturing agents, e.g. benzoyl peroxide, calcium peroxide, hydrogen peroxide and the like; starch modifiers such as peracetic acid, sodium chlorite, sodium hypochlorite, propylene oxide, succinic anhydride and the like, buffers and neutralizing agents, e.g., sodium acetate, ammonium bicarbonate, ammonium phosphate, citric acid, lactic acid, vinegar and the like; colorants, e.g., carminic acid, cochineal, tumeric and curcuma and the like; firming agents such as aluminum sodium sulfate, calcium chloride and calcium gluconate; texturizers, anticaking agents, e.g., aluminum calcium sulfate and tribasic calsium phosphate; enzymes; yeast foods, e.g., calcium lactate and caldium sulfate; nutrient supplements, e.g., iron salts such as ferric phosphate, ferrous gluconate and the like, riboflavin, vitamins, zinc sources such as zinc chloride, zinc sulfate and the like.

Other flavorants and flavor intensifiers include organic acids, e.g., acetic acid, formic acid, 2-hexenoic acid, benzoic acid, n-butyric acid, caproic acid, caprylic acid, cinnamic acid, isobutyric acid, isovaleric acid, alpha-methylbutyric acid, propionic acid, valeric acid, 2-methyl-2-pentenoic acid, and 2-methyl-3-pentenoic acid; ketones and aldehydes, e.g., acetaldehyde, acetophenone, acetone, acetyl methyl carbinol, acrolein, n-butanal, crotonal, diacetyl, 2-methylbutanal, beta,beta-dimethylacrolein, methyl n-amyl ketone, n-hexanal, 2-hexenal, isopentanal, hydrocinnamic aldehyde, cis-3-hexenal, 2-heptenal, nonyl aldehyde, 4-(p-hydroxyphenyl)-2-butanone, alpha-ionone, beta-ionone, 2-methyl-3-butanone, benzaldehyde, damascone, α-damascone, damascenone, acetophenone, 2-heptanone, o-hydroxyacetophenone, 2-methyl-2-hepten-6-one, 2-octanone, 2-undecanone, 3-phenyl-4-pentenal, 2-phenyl-2-hexenal, 2-phenyl-2-pentenal, furfural, 5-methylfurfural, cinnamaldehyde, beta-cyclohomocitral, 2-pentanone, 2-pentenal and propanal; alcohols such as 1-butanol, benzyl alcohol, 1-borneol, trans-2-buten-1-ol, ethanol, geraniol, 1-hexanol, 2-heptanol, trans-2-hexenol-1, cis-3-hexen-1-ol, 3-methyl-3-buten-1-ol, 1-pentanol, 1-penten-3-ol, p-hydroxyphenyl-2-ethanol, isoamyl alcohol, isofenchyl alcohol, phenyl-2-ethanol, alpha-terpineol, cis-terpin hydrate, eugenol, linalool, 2-heptanol, acetoin; esters, such as butyl acetate, ethyl acetate, ethyl acetoacetate, ethyl benzoate, ethyl butyrate, ethyl caprate, ethyl caproate, ethyl carpylate, ethyl cinnamate, ethyl crotonate, ethyl formate, ethyl isobutyrate, ethyl isovalerate, ethyl laurate, ethyl myristate, ethyl alphamethylbutyrate, ethyl propionate, ethyl salicylate, trans-2-hexenyl acetate, hexyl acetate, 2-hexenyl butyrate, hexyl butyrate, isoamyl acetate, isopropyl butyrate, methyl acetate, methyl butyrate, methyl caproate, methyl isobutyrate, alpha-methylphenylglycidate, ethyl succinate, isobutyl cinnamate, cinnamyl formate, methyl cinnamate and terpenyl acetate; hydrocarbons such as dimethyl naphthalene, dodecane, methyldiphenyl, methyl naphthalene, myrcene, naphthalene, octadecane, tetradecane, tetramethylnaphthalene, tridecane, trimethylnaphthalene, undecane, caryophyllene, α-phellandrene, β-phellandrene, p-cymene 1-alpha-pinene, beta-pinene, dihydrocarveol; pyrazines such as 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2-ethyl-3,5,6-trimethylpyrazine, 3-isoamyl-2,5dimethylpyrazine, 5-isoamyl-2,3-dimethylpyrazine, 2-isoamyl-3,5,6-trimethylpyrazine, isopropyl dimethylpyrazine, methyl ethylpyrazine, tetramethylpyrazine, trimethylpyrazine; essential oils such as jasmine absolute, cassia oil, cinnamon bark oil, black pepper oleoresin, oil of black pepper, rose absolute, orris absolute, oil of cubeb, oil of coriander, oil of pimento leaf, oil of patchouli, oil of nutmeg, lemon essential oil, safran oil, Bulgarian rose, capsicum, yara yara and vanilla; lactones such as γ-nonalactone; sulfides, e.g., methyl sulfide and other materials such as maltol, and acetal (e.g., 1,1-diethoxyethane, 1,1-dimethoxyethane and dimethoxymethane), piperine, chavicine, and piperidine.

The specific flavoring adjuvant selected for use may be either solid or liquid depending upon the desired physical form of the ultimate product, i.e., foodstuff, whether simulated or natural, and should, in any event, (i) be organoleptically compatible with the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention by not covering or spoiling the organoleptic properties (aroma and/or taste) thereof; (ii) be non-reactive with the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention and (iii) be capable of providing an environment in which the methyl substituted oxobicyclo-4,4,0-decane derivatives can be dispersed or admixed to provide a homogeneous medium. In addition, selection of one or more flavoring adjuvants, as well as the quantities thereof will depend upon the precise organoleptic character desired in the finished product. Thus, in the case of flavoring compositons, ingredient selection will vary in accordance with the foodstuff, chewing gum, medicinal product or toothpaste to which the flavor and/or aroma are to be imparted, modified, altered or enhanced. In contradistinction, in the preparation of solid products, e.g., simulated foodstuffs, ingredients capable of providing normally solid compositions should be selected such as various cellulose derivatives.

As will be appreciated by those skilled in the art, the amount of methyl substituted oxobicyclo-4,4,0-decane derivatives employed in a particular instance can vary over a relatively wide range, depending upon the desired organoleptic effects to be achieved. Thus, correspondingly, greater amounts would be necessary in those instances wherein the ultimate food composition to be flavored is relatively bland to the taste, whereas relatively minor quantities may suffice for purposes of enhancing the composition merely deficient in natural flavor or aroma. The primary requirement is that the amount selected to be effective, i.e., sufficient to alter, modify or enhance the organoleptic characteristics of the parent composition, whether foodstuff per se, chewing gum, per se, medicinal product per se, toothpaste per se, or flavoring composition.

The use of insufficient quantities of methyl substituted oxobicyclo-4,4,0-decane derivatives will, of course, substantially vitiate any possibility of obtaining the desired results while excess quantities prove needlessly costly and, in extreme cases, may disrupt the flavor-aroma balance, thus proving self-defeating. Accordingly, the terminology "effective amount" and "sufficient amount" is to be accorded a significance in the context of the present invention consistent with the obtention of desired flavoring effects.

Thus, and with respect to ultimate food compositions, chewing gum compositions, medicinal product compositions and toothpaste compositons, it is found that quantities of methyl substituted oxobicyclo-4,4,0-decane derivatives ranging from a small but effective amount, e.g., 0.01 parts per million up to about 100 parts per million based on total composition are suitable. Concentrations in excess of the maximum quantity stated are not normally recommended, since they fail to prove commensurate enhancement of organoleptic properties. In those instances, wherein the methyl substituted oxobicyclo-4,4,0-decane derivatives are added to the foodstuff as an integral component of a flavoring composition, it is, of course, essential that the total quantity of flavoring composition employed be sufficient to yield an effective methyl substituted oxobicyclo-4,4,0-decane derivative concentration in the foodstuff product.

Food flavoring compositions prepared in accordance with the present invention preferably contain the methyl substituted oxobicyclo-4,4,0-decane derivatives in concentrations ranging from about 0.01% up to about 15% by weight based on the total weight of the said flavoring composition.

The composition described herein can be prepared according to conventional techniques well known as typified by cake batters and fruit drinks and can be formualted by merely admixing the involved ingredients within the proportions stated in a suitable blender to obtain the desired consistency, homogeneity of disperseion, etc. Alternatively, flavoring compositions in the form of particulate solids can be conveniently prepared by mixing the methyl substituted oxobicyclo-4,4,0-decane derivatives with, for example, gum arabic, gum tragacanth, carrageenan and the like, and thereafter spray-drying the resultant mixture whereby to obtain the particular solid product. Pre-prepared flavor mixes in powder form, e.g., a fruit-flavored powder mix are obtained by mixing the dried solid components, e.g., starch, sugar and the like and methyl substituted oxobicyclo-4,4,0-decane derivatives in a dry blender until the requisite degree of uniformity is achieved.

It is presently preferred to combine with the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention, the following adjuvants:

Heliotropin;

Terpinenol-4;

Benzaldehyde;

Anisaldehyde;

Phenyl acetaldehyde;

Benzyl formate;

Benzyl acetate;

Cis-3-hexenyl benzoate;

Methyl Hexanoate;

Hexanal;

Eucalyptol;

Eugenol;

Acetaldehyde;

Ethyl acetate;

Ethyl butyrate;

Turpentine gum oil;

Limonene;

Gum camphor;

Isobornyl acetate;

Borneol;

Cinnamic aldehyde;

Cuminic aldehyde;

Furfural;

Methyl cinnamate;

Cassia oil;

Vanillin;

Maltol;

Parahydroxybenzylacetone;

Dimethyl sulfide;

Alpha-ionone;

Acetic acid;

Isobutyl acetate;

Acetone;

Butyric acid;

Formic acid;

Valeric acid;

Amyl acetate;

Amyl butyrate;

Anethol;

Benzyl salicylate;

Diacetyl;

Dimethyl anthranilate;

Ethyl methylphenylglycidate;

Ethyl succinate;

Ethyl valerate;

Geraniol;

Cis-3-hexen-1-ol;

2-Hexenyl acetate;

2-Hexenyl butyrate;

Hexyl butyrate;

4-(p-Hydroxyphenyl)-2-butanone;

Beta-ionone;

Isobutyl cinnamate;

Jasmine;

Lemon essential oil;

Methyl butyrate

Methyl capronate;

Methyl disulfide;

Methyl p-naphthyl ketone;

Orris butter;

Rose absolute;

Terpenyl acetate;

Gamma-undecalactone;

Vanilla;

Alcohol;

Oil of Cubeb;

Phellandrene;

β-phellandrene;

Oil or Coriander;

Oil of Pimento Leaf;

Oil of Patchouli;

Alpha Pinene;

Beta Pinene;

Beta-caryophyllene;

Dihydrocarveol;

Piperonal;

Piperine;

Chavicine;

Piperidine;

Oil of Black Pepper;

Black Pepper Oleoresin;

Capsicum;

Oil of Nutmeg;

Cardamom Oil;

Clove Oil;

Spearmint Oil; and

Oil of Peppermint.

An additional aspect of our invention provides an organoleptically improved smoking tobacco product and additives therefor, as well as methods of making the same which overcome problems heretofore encountered in which specific desired sweet, fruity, berry-like, woody and floral flavor characteristics of natural tobacco (prior to smoking and, on smoking, in the mainstream and in the sidestream) as well as cooling effects, are created or enhanced or modified or augmented and may be readily controlled and maintained at the desired uniform level regardless of variations in the tobacco components of the blend.

This invention further provides improved tobacco additives and methods whereby various desirable natural aromatic tobacco flavoring characteristics with sweet, fruity, berry-like, cooling, woody and floral notes may be imparted to smoking tobacco products and may be readily varied and controlled to produce the desired uniform flavoring characteristics.

In carrying out this aspect of our invention, we add to smoking tobacco materials or a suitable substitute therefor (e.g., dried lettuce leaves) an aroma and flavor additive containing as an active ingredient one or more methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention.

In addition to the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention other flavoring and aroma additives may be added to the smoking tobacco material or substitute therefor either separately or in mixture with the methyl substituted oxobicyclo-4,4,0-decane derivatives as follows:

I. Synthetic Materials:

Beta-ethyl-cinnameldehyde;

Eugenol;

Dipentene;

Damascenone;

Maltol;

Ethyl maltol;

Delta undecalactone;

Delta decalactone;

Benzaldehyde;

Amyl acetate;

Ethyl butyrate;

Ethyl valerate;

Ethyl acetate;

2-hexenol-1;

2-Methyl-5-isopropyl-1,3-nonadiene-8-one;

2,6-Dimethyl-2,6-undecadiene-10-one;

2-Methyl-5-isopropylacetophenone;

2-Hydroxy-2,5,5,8a-tetramethyl-1-(2-hydroxyethyl)-decahydronaphthalene;

Dodecahydro-3a,6,6,9a-tetramethylnaphtho-(2,1-b)-furan

4-Hydroxyhexanoic acid, gamma lactone; and

Polyisoprenoid hydrocarbons defined in Example V of U.S. Pat. No. 3,589,372 issued on June 29, 1971.

II. Natural Oils:

Celery seed oil;

Coffee Extract;

Bergamot Oil;

Cocoa extract;

Nutmeg Oil; and

Origanum Oil.

An aroma and flavoring concentrate containing one or more methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention and, if desired, one or more of the above indicated additional flavoring additives may be added to the smoking tobacco material, to the filter or to the leaf or paper wrapper. The smoking tobacco material may be shredded, cured, cased and blended tobacco material or reconstituted tobacco material or tobacco substitutes (e.g., lettuce leaves) or mixtures thereof. The proportions of flavoring additives may be varied in accordance with taste but insofar as enhancement or the imparting of natural and/or sweet notes and/or cooling notes and/or fruity notes and/or woody notes, we have found that satisfactory results are obtained if the proportion by weight of the sum total of methyl substituted oxobicyclo-4,4,0-decane derivative(s) to smoking tobacco material is between 50 ppm and 1,500 ppm (0.015%-0.15%). We have further found that satisfactory results are obtained if the proportion by weight of the sum total of methyl substituted oxobocyclo-4,4,0-decane derivative used to flavoring material is between 1,500 and 15,000 ppm (0.15%-1.5%).

Any convenient method for incorporating the methyl substituted oxobicyclo-4,4,0-decane derivative(s) into the tobacco product may be employed. Thus, the methyl substituted oxobicyclo-4,4,0-decane derivative(s) taken alone or along with other flavoring additives may be dissolved in a suitable solvent such as ethanol, diethyl ether and/or volative organic solvents and the resulting solution may either be spread on the cured, cased and blended tobacco material or the tobacco material may be dipped into such solution. Under certain circumstances, a solution of the methyl substituted oxobicyclo-4,4,0-decane derivative(s) taken alone or taken further together with other flavoring additives as set forth above, may be applied by means of a suitable applicator such as a brush or roller on the paper or leaf wrapper for the smoking product, or it may be applied to the filter by either spraying, or dipping, or coating.

Furthermore, it will be apparent that only a portion of the tobacco or substitute need be treated and the thus treated tobacco may be blended with other tobaccos before the ultimate tobacco product is formed. In such cases, the tobacco treated may have the methyl substituted oxobicyclo-4,4,0-decane derivative(s) in excess of the amounts or concentrations above indicated so that when blended with other tobaccos, the final product will have the percentage within the indicated range.

In accordance with one specific example of our invention, an aged, cured and shredded domestic burley tobacco is sprayed with a 20% ethyl alcohol solution of 3,4,4A,5,8,8A-hexahydro-2,2,5,8A-tetramethyl-1-(2H)-naphthalenone prepared according to Example VI(B), in an amount to provide a tobacco composition containing 800 ppm by weight of 3,4,4A,5,8,8A-hexahydro-2,2,5,8A-tetramethyl-1-(2H)-naphthalenone on a dry basis. Thereafter, the alcohol is removed by evaporation and the tobacco is manufactured into cigarettes by the usual techniques. The cigarette when treated as indicated has a desired and pleasing aroma which is detectable in the main and sidestreams when the cigarette is smoked. This aroma is described as being sweeter, more aromatic, more tobacco-like and having a sweet, fruity note.

While our invention is particularly useful in the manufacture of smoking tobacco, such as cigarette tobacco, cigar tobacco and pipe tobacco, other otbacco products, formed from sheeted tobacco dust or fines may also be used. Likewise, the methyl substituted oxobicyclo-4,4,0-decane derivative(s) of our invention can be incorporated with materials such as filter tip materials (e.g. cellulose acetate filters wherein sweet, woody, fruity, floral and/or cooling effects are desired), seam paste, packaging materials and the like which are used along with tobacco to form a product adapted for smoking. Furthermore, the methyl substituted oxobicyclo-4,4,0-decane derivative(s) can be added to certain tobacco substitutes of natural or synthetic origin (e.g., dried lettuce leaves) and, accordingly, by the term "tobacco" as used throughout this specification is meant any composition intended for human consumption by smoking or otherwise, whether composed of tobacco plant parts or substitute materials or both.

The methyl substituted oxobicyclo-4,4,0-decane derivative(s) and one or more auxiliary perfume ingredients, including, for example, hydrocarbons, alcohols, ketones, aldehydes, nitriles, esters, lactones or cyclic esters, synthetic essential oils and natural essential oils, may be admixed so that the combined odors of the individual components produce a pleasant and desired fragrance, particularly and preferably in sandalwoody and/or patchouli-like fragrances. Such perfume compositions usually contain (a) the main note or the "bouquet" or foundation stone of the composition; (b) modifiers which round off and accompany the main note; (c) fixatives which include odorous substances which lend a particular note to the perfume throughout all stages of evaporation and substances which retard evaporation; and (d) topnotes which are usually low boiling fresh smelling materials.

In perfume compositions, it is the individual components which contribute to their particular olfactory characteristics, however the over-all sensory effect of the perfume composition will be at least the sum total of the effects of each of the ingredients. Thus, one or more of the methyl substituted oxobicyclo-4,4,0-decane derivative(s) of our invention can be used to alter, modify or enhance the aroma characteristics of a perfume composition, for example, by utilizing or moderating the olfactory reaction contributed by another ingredient in the composition.

The amount of methyl substituted oxobicyclo-4,4,0-decane derivative(s) of our invention which will be effective in perfume compositions as well as in perfumed articles and colognes depends on many factors, including the other ingredients, their amounts and the effects which are desired. It has been found that perfume compositions containing as little as 0.01% of methyl substituted oxobicyclo-4,4,0-decane derivative(s) or even less (e.g. 0.005%) can be used to impart a minty, camphoraceous, dry, woody, sweet, fruity, patchouli-like, woody patchouli, green, herbaceous, basil-like, citrus-like, bergamot-like, lime-like, grapefruit-like, peppery, precious woody, vertiver-like, fresh, musky, lavander, thyme, rosemary, sweaty, rooty and earthy nuances with floral, citris, lavander and amber topnotes to soaps, cosmetics, detergents (including anionic, non-ionic, cationic and zwitter-ionic solid or liquid detergents) or other products. The amount employed can range up to 70% of the fragrance components and will depend on considerations of cost, nature of the end product, the effect desired on the finished product and the particular fragrance sought.

The methyl substituted oxobicyclo-4,4,0-decane derivative(s) of our invention are useful (taken along or together with other ingredients in perfume compositions) in detergents and soaps, space odorants and deodorants, perfumes, colognes, toilet water, hair preparations, such as lacquers, brilliantines, pomades and shampoos; cosmetic preparations, such as, creams, deodorants, hand lotions and sun screens; powders, such as talcs, dusting powders, face powders and the like. As little as 0.1% of the methyl substituted oxobicyclo-4,4,0-decane derivative(s) will suffice to impart an intense minty, camphoraceous, dry woody, sweet fruity, patchouli, woody patchouli, green, herbaceous, basil-like, citrus-like, bergamot-like, lime-like, graperfruit-like, peppery, precious woody, vertiver-like, fresh, musky, lavander, thyme, rosemary, sweaty, rooty and/or earthy aroma to woody perfume formulations. Generally, no more than 5% of the methyl substituted oxobicyclo-4,4,0-decane derivative(s) based on the ultimate end product, is required in the perfume composition.

In addition, the perfume composition or fragrance composition of our invention can contain a vehicle, or carrier for the methyl substituted oxobicyclo-4,4,0-decane derivative(s). The vehicle can be a liquid such as a non-toxic alcohol, a non-toxic glycol, or the like. The carrier can also be an absorbent solid, such as gum (e.g., gum arabic), or components for encapsulating the composition (such as gelatin).

It will thus be apparent that the methyl substituted oxobicyclo-4,4,0-decane derivative(s) of our invention can be utilized to alter, modify or enhance sensory properties, particularly organoleptic properties, such as flavor(s) and/or fragrance(s) of a wide variety of consumable materials.

The following Examples serve to illustrate processes for specifically producing the methyl substituted oxobicyclo-4,4,0-decane derivatives of our invention and also serve to illustrate specific embodiments of our invention.

It will be understood that these Examples are illustrative and the invention is to be considered restricted thereto only as indicated in the appended claims.

All parts and percentages given herein are by weight unless otherwise specified.

EXAMPLE I Preparation of 3,4,4A,5,8,8A,Hexahydro-2,2,8A-Trimethyl-1-(2H)-Naphthalenone

Reaction: ##STR52##

483.0 g (3.5 moles) of 2,6,6-trimethyl-2-cyclohexenone-1, 48.0 g (0.36 moles) of aluminum chloride and 200 cc of anhydrous toluene are combined at room temperature. When the exotherm ceases, the reaction mass is cooled to 0° C. The mixture of cyclohexenone, toluene and aluminum chloride is placed in an autoclave. The contents of the autoclave are cooled to 0° C. and the butadiene (216 g, 4.0 moles) is added. The autoclave is closed immediately and set to operate at room temperature for 6 hours. At the end of the 6 hour period, substantially no cyclohexenone remains. The reaction mass is then transferred to a separatory funnel whereupon water is added and sufficient acetic acid is added to give good separation. The organic layer is washed with two 200 cc volume of sodium bicarbonate. The reaction mass is then stripped and distilled on a one-plate distillation column to yield 429 g of product (64% of theory) with the following fractions:

    ______________________________________                                                   Vapor   Liquid           Weight of                                   Fraction  Temp.   Temp.     mm/Hg  Fraction                                    No.       (°C.)                                                                           (°C.)                                                                             Pressure                                                                              (g.)                                        ______________________________________                                         1         70/77   95/100    1.5/1.5                                                                               17.0                                        2         85      103       1.4    44.0                                        3         90      110       1.4    95.0                                        4         90      111       1.4    97.0                                        5         90      115       1.4    93.0                                        6         92      167       2.0    83.0                                        ______________________________________                                    

NMR, IR and mass spectral analysis yield the information that the resulting product has the structure: ##STR53##

EXAMPLE II Preparation of Octahydro-2,2,8A-Trimethyl-1(2H)-Naphthalenone

Reaction: ##STR54##

Into a shaker-type pressure vessel (Parr® shaker) is placed 50.5 g of the ketone produced according to Example I having the structure: ##STR55## 0.6 g of a 10% palladium on carbon catalyst and 50 ml iso-propyl alcohol. The pressure vessel is closed and pressurized with hydrogen to a pressure of 50 psig and maintained at that pressure for a period of 1.3 hours. At the end of the 1.3 hour period the pressure vessel is opened and the contents filtered. The filtrate is stripped of solvent (iso-propyl alcohol) and then distilled using a microdistillation apparatus yielding the following fractions:

    ______________________________________                                                  Vapor         Liquid                                                  Fraction Temp.         Temp.   mm/Hg.                                          No.      (°C.)  (°C.)                                                                           Pressure                                        ______________________________________                                         1        98/99         102/102 3.0/3.0                                         2        100           104     3.0                                             3        99            105     3.0                                             4        80            104     3.0                                             5        99            110     3.0                                             6        99            140     3.0                                             7        80            240     3.0                                             ______________________________________                                    

The yield is 89%, with fractions 1-6 bulked.

NMR, IR and mass spectral analysis yield the information that the resulting product has the structure: ##STR56##

EXAMPLE III Preparation of 3,4,4A,58,8A-Hexahydro-2,2,6(and 7), 8A-Tetramethyl-1-(2H)-Naphthalone

Reaction: ##STR57##

At room temperature, 69 g (0.5 moles) of 2,6,6-cyclohexenone is admixed with 6.7 g (0.05 moles) of aluminum trichloride. The reaction mass exoterms to 44° C. and is cooled. The reaction mass is cooled to 22° C. and over a period of 10 minutes 34 g (0.5 moles) of isoprene is added to the reaction mixture. The reaction mass is stirred at room temperature with cooling for a period of of 1 hour. 0.5 moles additional isoprene is then added. The reaction mass is stirred for an additional hour. At the end of this hour, 150 ml water is added. The reaction mass is then washed as follows:

a. two 250 ml volumes of water

b. two volumes of saturated sodium carbonate

c. one 250 ml volume of saturated sodium chloride solution.

All aqueous layers are combined and extracted with 150 ml toluene. The extract is washed with saturated sodium chloride and the extract and oil layers are then combined and washed with two 250 ml volume of 10% sodium chloride. The oil and aqueous layers are separated and the oil layer is dried over anhydrous sodium sulfate. The resulting material is filtered and then distilled on an one-plate distillation column giving 69 g of product (67% yield) with b.p. of 102°-104° C./3 mmHg.

NMR, IR, and mass spectral analysis yield the information that the resulting product is a mixture of compounds having the structures: ##STR58##

EXAMPLE IV Preparation of Octahydro-2,2,6(and 7),8A, Tetramethyl-1-1(2H)-Naphthalenone

Reaction: ##STR59##

Into a hydrogenation pressure vessel is placed 84 g of the ketone mixture produced according to Example III containing compounds having the structures: ##STR60## (0.41 moles); 0.5 grams of a 10% palladium on carbon catalyst and 100 ml of isopropyl alcohol. The pressure vessel is closed and with shaking the hydrogen pressure is build up to 44-50 psig. Hydrogen pressure is maintained for a period of 9.3 hours. At the end of the 9.3 hour period the pressure vessel is opened and the contents are filtered and stripped of solvent. The resulting oil is then distilled in a microdistillation apparatus yielding the following fractions:

    ______________________________________                                                   Vapor   Liquid            Weight of                                  Fraction  Temp.   Temp.      mm/Hg  Fraction                                   No.       (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                       ______________________________________                                         1         97/100  109/107    3.0    3.5                                        2         100     110        3.0    13.7                                       3         100     115        3.0    10.9                                       4         102     122        3.0    23.3                                       5         100     165        3.0    6.8                                        ______________________________________                                    

Fractions 1-5 are bulked. The yield is 95%.

NMR, IR and mass spectral analysis yield the information that the resulting product contains the compounds having the structures: ##STR61##

EXAMPLE V Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-2,2,6(&7), 8A-Tetrahydro-1-Naphthol

Reaction: ##STR62##

Into a reaction flask equipped with stirrer thermometer and reflux condenser, place 75 g (0.36 moles) of the product of Example III containing the compounds having the structures: ##STR63## and 50 ml isopropyl alcohol. Then, a mixture of 5.1 g (0.13 moles) of sodium borohydride and 50 ml of isopropyl alcohol is added at room temperature.

The reaction mass is stirred for a period of 5 hours at room temperature and then for a period of 3 hours at 77° C. The reaction is then quenched by adding the reaction mass to 10% acetic acid, aqueous solution. The aqueous phase is separated from the organic phase and the organic phase is washed with saturated sodium carbonate solution and then 10% sodium chloride solution. The organic phase is then dried over anhydrous sodium sulfate and fractionated on a microdistillation apparatus yielding the following fractions:

    ______________________________________                                                  Vapor    Liquid            Weight of                                  Fraction Temp.    Temp.      mm/Hg  Fraction                                   No.      (°C.)                                                                            (°C.)                                                                              Pressure                                                                              (g.)                                       ______________________________________                                         1        27/25     43/105    3.0/3.0                                                                               3.7                                        2         47/102  104/112    3.0    2.7                                        3        113      127        3.0    3.6                                        4        121      135        3.0    10.7                                       5        121      140        3.0    5.7                                        6        121      145        3.0    5.0                                        7        118      147        3.0    5.9                                        8        108      167        3.0    14.9                                       9         90      245        3.0    7.6                                        ______________________________________                                    

Fractions 4-7 are bulked (yield is 49%).

NMR, IR and mass spectral analysis yield the information that the resulting product is a mixture of compounds having the structures: ##STR64##

EXAMPLE VIA Preparation of 3,4,4A,5,8,8A-Hexahydro-2,2,8(and 5),8A-Tetramethyl-1-(2H)-Naphthalenone

Reaction: ##STR65##

Into a reaction flask equipped with thermometer, reflux condenser and cooling bath is placed 69 g (5 moles) of 2,6,6-trimethyl cyclohexenone. Over a period of 17 minutes with cooling while maintaining the reaction mass at 10° C.-25° C., 6.7 g (0.05 moles) of aluminum trichloride is added thereto. Then, 34 g (0.5 moles) of piperylene (1,3-pentadiene) is then added to the reaction mass with cooling over a period of one hour. The reaction mass is then stirred for a period of one hour at a temperature of 25° C. 100 ml of 10% aqueous hydrochloric acid is then added to the reaction mass with cooling. The aqueous phase is separated from the organic phase and toluene is added thereto. The organic layer is then washed with 100 ml 10% aqueous sodium chloride followed by 10% aqueous sodium hydroxide. The resulting material is then dried over anhydrous sodium sulfate, admixed with sodium bicarbonate, in order to scavange any acid present. The resulting product is filtered and the solvent is stripped off.

The resulting material is fractionally distilled on a six inch microdistillation column to yield the following fractions:

    ______________________________________                                                   Vapor   Liquid           Weight of                                   Fraction  Temp.   Temp.     mm/Hg  Fraction                                    No.       (°C.)                                                                           (°C.)                                                                             Pressure                                                                              (g.)                                        ______________________________________                                         1         36/90   77/108    3.0/3.0                                                                               14.5                                        2          99     112       3.0    4.8                                         3         101     115       3.0    7.3                                         4         102     112       3.0    8.4                                         5         102     116       3.0    5.2                                         6         103     119       3.0    11.8                                        7         103     126       3.0    11.4                                        8         103     158       3.0    11.2                                        9          90     220       3.0    6.1                                         ______________________________________                                    

Fractions 2-8 are bulked (yield: 61%)

NMR, IR and spectral analysis yield the information that the resulting product is a mixture of the compounds having the structures: ##STR66##

EXAMPLE VIB Preparation of 3,4,4A,5,8,8A-Hexahydro-2,2,8(and 5),8A-Tetramethyl-1-(2H)-Naphthalenone

Reaction: ##STR67##

Into a 5 liter reaction flask equipped with stirrer, condenser, thermometer and dropping funnel is placed 200 cc toluene. 33.5 g (0.25 moles) of aluminum chloride is then added. 345 g (2.5 moles) of 2,6,6-cyclohexenone is then added dropwise to the reaction mass which exotherms to 35° C. The reaction mass is cooled to room temperature and 340.0 g (5.0 moles) of piperylene is added dropwise maintaining the temperature at 25° C. The reaction mass is then stirred at room temperature for a period of six hours while being monitered by GLC to completion (conditions: SE 30, column programmed at 100°-150° C. at 8° C. per minute). The reaction mass is then "worked up" by adding water, stirring and separating the layers. The organic layer is then washed with one 1000 cc volume of water stripped and distilled to yield 414 g of product (80% of theory). The distillation is carried out on a 12 inch-packed column (stone) yielding the following fractions:

    ______________________________________                                                  Vapor   Liquid            Weight of                                   Fraction Temp.   Temp.      mm/Hg  Fraction                                    No.      (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                        ______________________________________                                         1        56/70   100/110    2.0/2.8                                                                               33.0                                        2         80     120        0.8    32.0                                        3        100     125        0.8    64.0                                        4        102     126        0.8    77.0                                        5        102     130        0.8    90.0                                        6        101     140        0.5    67.0                                        7         94     172        0.5    41.0                                        8         80     230        0.5    70.0                                        ______________________________________                                    

Fractions 3-7 are bulked.

NMR, IR and mass spectral analysis yield the information that the resulting product is a mixture of compounds having the structures: ##STR68##

EXAMPLE VIIA Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-2,2,8A-Trimethyl-1-Naphthol

Reaction: ##STR69##

Into a reaction flask, equipped with stirrer, thermometer, reflux condenser and cooling bath, is placed 50 ml anhydrous isopropyl alcohol and 45.4 g (0.12 moles) of 12% sodium borohydride aqueous solution. Over a period of five minutes the ketone reaction product of Example I (245 g; 1.28 moles) having the structure: ##STR70## is added to the reaction mass. The reaction mass is then heated to 88° C. and maintained at that temperature for a period of 8 hours. The resulting reaction product is poured into 100 ml of water and extracted with 50 ml of diethyl ether twice. The organic layer is washed with saturated sodium chloride solution and dried over anhydrous sodium sulfate. Stripping of the solvent gives 17 g of crystalline product (85% yield). The crude product is recrystallized from hexane giving pure product having a m.p. 58°-59° C.

    ______________________________________                                                   Vapor       Liquid                                                   Fraction  Temp.       Temp.    mm/Hg                                           No.       (°C.)                                                                               (°C.)                                                                            Pressure                                        ______________________________________                                         1         97/105      114/120  4.0/3.2                                         2         111         157      3.0                                             3         114         235      3.0                                             ______________________________________                                    

NMR, IR and mass spectral analysis yield the information that the resulting product has the structure: ##STR71##

EXAMPLE VIIB Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-2,2,8A-Trimethyl-1-Naphthol

Reaction: ##STR72##

Into a 250 cc reaction flask equipped with stirrer, condenser, thermometer, dropping funnel and nitrogen inlet tube, to provide a nitrogen blanket, is placed 60 cc (0.15 moles) of 2.5 M solution of isopropyl magnesium chloride in diethyl ether. The grignard reagent solution is cooled to 10° C. and dropwise over a period of 5 minutes, 19.2 g (0.1 moles) of the ketone having the structure: ##STR73## prepared according to Example I is added. The reaction mass exotherms to 30° C. The reaction mass is refluxed for a period of 1.5 hours whereupon GLC analysis indicates completion of the reaction (conditions: SE 30, column programed at 150° C. at 8° C. per minute). The reaction mass is the hydrolyzed with 20 cc of an ammonium chloride solution. The organic phase is separated from the aqueous phase, dried, stripped and distilled on a one-plate column to yield 17 g of crystals having b.p. 100°-114° C./2 mmHg pressure.

The resulting material as confirmed by GLC, IR, and mass spectral analysis has the structure: ##STR74##

EXAMPLE VIII Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-2,2,8(and 5),8A-Tetramethyl-1-Naphthol

Reaction: ##STR75##

Into a 500 cc reaction flask equipped with stirrer, condenser, thermometer and dropping funnel, 20.7 g (0.55 moles) of lithium aluminum hydride and 50 cc of tetrahydrofuran are added. Dropwise over a period of 5 minutes, 114.0 g (0.55 moles) of the mixture of ketone having the structures: ##STR76## prepared according to Example VIA is added while maintaining the reaction mass at 10°-20° C.

After addition of the mixture of ketones, the reaction mass is stirred at 25° C. for a period of one hour. At the end of the one hour period, GLC analysis indicates that the reaction is complete, there being no starting material present.

The resulting lithium salt reaction product is then hydrolyzed using 20 cc of a 0.4 molar ammonium chloride solution. The resulting two phases, the aqueous phase and the organic phase are separated and the organic phase is dried over anhydrous sodium sulfate, stripped of solvent and distilled on a one plate column yielding 45 g of products (43% of theory). The product is then distilled on a 12-inch stonepack column yielding the following fractions:

    ______________________________________                                                  Vapor   Liquid            Weight of                                   Fraction Temp.   Temp.      mm/Hg  Fraction                                    No.      (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                        ______________________________________                                         1        80/95   110/115    1.5/1.0                                                                               2.0                                         2        105     115        1.0    9.0                                         3        105     120        0.9    24.0                                        4        105     200        0.9    7.0                                         ______________________________________                                    

NMR, IR and mass spectral analysis yield the information that the product is a mixture of compounds having two structures: ##STR77##

EXAMPLE IX Preparation of 2,2,6(and 7),8A-Tetramethyl-1-Naphthol

Reaction: ##STR78##

Into a 500 cc reaction flask equipped with stirrer, condenser, thermometer and dropping funnel are placed 100 cc of tetrahydrofuran and 16.23 g (0.408 moles) of 95% lithium aluminum hydride thereby forming a slurry. While maintaining the temperature of the slurry at 10°-20° C., and over a 20 minute period, 85 g (0.408 moles) of the mixture of ketones having the structures: ##STR79## prepared according to Example IV. After addition the reaction mass is stirred at room temperature for a period of 1.5 hours at the end of which time GLC analysis and IR analysis indicates that the reaction is complete.

200 cc of water are then added to the reaction mass with cooling. The reaction mass is then extracted with two 100 cc portions of toluene. The toluene extract is then stripped (of toluene) and the residue is distilled yielding 81.5 g (96% of theory) of product, confirmed by IR, mass spectral analysis and NMR analysis to be a mixture of compounds having the structures: ##STR80##

The distillation is carried out using microdistillation apparatus yielding the following fractions:

    ______________________________________                                                  Vapor    Liquid            Weight of                                  Fraction Temp.    Temp.      mm/Hg  Fraction                                   No.      (°C.)                                                                            (°C.)                                                                              Pressure                                                                              (g.)                                       ______________________________________                                         1        120/120  122/125    0.6/0.6                                                                               12.0                                       2        120      125        0.6    17.0                                       3        120      125        0.6    15.0                                       4        120      125        0.6    14.0                                       5        120      188        0.6    24.0                                       ______________________________________                                    

EXAMPLE X Preparation of Decahydro-2,2,8A-Trimethyl-1-Naphthol

Reaction: ##STR81##

Into a 500 cc reaction flask fitted with stirrer, condenser, thermomether and dropping funnel is placed 14.8 g (0.39 moles) of lithium aluminum hydride in 70 cc of tetrahydrofuran. To the resulting lithium aluminum hydride slurry, dropwise, is added 76.0 g (0.39 moles) of the ketone having the structure: ##STR82## prepared according to Example II. The reaction mass is stirred at room temperature for a period of 3 hours. At the end of the 3 hour period, IR and GLC analysis indicate completion of the reaction. To the resulting reaction mass 100 cc of 0.4 molar acetic acid is added. The organic phase is separated from the aqueous phase and the organic phase is washed with two 50 cc saturated sodium bicarbonate solution portions. The resulting material is then dried over anhydrous sodium sulfate, stripped of solvent and distilled on a one-plate column. The resulting product is then redistilled on a 12 inch stone-packed column to yield the following fractions: (yield 86%)

    ______________________________________                                                   Vapor   Liquid           Weight of                                   Fraction  Temp.   Temp.     mm/Hg  Fraction                                    No.       (°C.)                                                                           (°C.)                                                                             Pressure                                                                              (g.)                                        ______________________________________                                         1         75/80   90/190    0.8/0.7                                                                               20.0                                        2         80      180       0.7    46.0                                        ______________________________________                                    

The total yield is 66.0 g (86.0% yield). The resulting product has the structure: ##STR83##

EXAMPLE XI Preparation of Octahydro-2,2,8,8a-Tetramethyl-1-(2H)-Naphthalenone

Reaction: ##STR84##

Into an autoclave is charged the following materials:

2.85 g of 10% palladium on carbon catalyst

200 cc isopropyl alcohol

114.0 g (0.55 moles) of the mixture of ketones having the structures: ##STR85## prepared according to Example VI(A).

At room temperature over a period of two hours while maintaining the pressure at 200 psig hydrogen is continually charged to the autoclave.

At the end of the two hour period, the autoclave is opened and the reaction mass is filtered over Supercell®. The reaction mass is then stripped of solvent and distilled on a one-plate column yielding 104.0 g (91% of theory) of a mixture of compounds having the structures: ##STR86##

The resulting product is then distilled on a 12 inch stone-packed column yielding the following fractions:

    ______________________________________                                                  Vapor   Liquid            Weight of                                   Fraction Temp.   Temp.      mm/Hg  Fraction                                    No.      (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                        ______________________________________                                         1        70/85   100/105    1.8/1.8                                                                                4.0                                        2        85      115        0.7    19.0                                        3        92      117        0.7    17.0                                        4        95      118        0.7    32.0                                        5        95      140        0.7    36.0                                        ______________________________________                                    

Fractions 2-5 are product, 91% yield.

GLC, IR, NMR and mass spectral analysis yield the information that the reaction product contains the compounds having the structures: ##STR87##

EXAMPLE XII Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-1,2,2,8A-Tetramethyl-1-Naphthol

Reaction: ##STR88##

Into a two liter reaction vessel equipped with thermometer, stirrer, addition funnel and reflux condenser are placed 620 ml (1.86 moles) of methyl magnesium chloride (3 M solution) dissolved in tetrahydrofuran. Into the addition funnel is placed a mixture of 250 ml tetrahydrofuran and 245 g (1.24 moles) of the ketone having the structure: ##STR89## prepared according to Example I.

Over a period of 3 hours the ketone/tetrahydrofuran solution is added to the grignard reagent/tetrahydrofuran solution while maintaining the reaction temperature at 32° C. At the completion of the addition of the ketone, the reaction mass is heated to a temperature in the range of 27°-45° C. while refluxing the reaction mass.

At the end of the reaction (one hour) the reaction mass is added to one liter of 20% acetic acid. The organic layer is washed with one liter of 10% sodium chloride followed by 500 ml saturated sodium carbonate followed by 500 ml saturated sodium chloride. The aqueous layer is extracted with toluene and the toluene extract is combined with the washed organic layer. The reaction product is then dried over anhydrous sodium sulfate, stripped of solvent and distilled yielding the following fractions: Fractions 2-11 are product, 86% yield.

    ______________________________________                                                  Vapor    Liquid            Weight of                                  Fraction Temp.    Temp.      mm/Hg  Fraction                                   No.      (°C.)                                                                            (°C.)                                                                              Pressure                                                                              (g.)                                       ______________________________________                                         1        119/137  150/157    2.3    13.9                                       2        110      146        1.5    18.5                                       3        110      137        2.0    19.1                                       4        111      137        2.0    17.1                                       5        112      143        2.0    18.6                                       6        115      144        2.0    21.9                                       7        113      144        1.8    25.5                                       8        113      145        1.8    29.0                                       9        114      147        1.8    29.8                                       10       114      165        1.8    26.3                                       11       111      225        1.8    15.5                                       ______________________________________                                          (Distillation carried out on 12 inch Goodlow column).                    

The reaction product has the structure: ##STR90## as confirmed by NMR, IR and mass spectral analysis. EXAMPLE XIII

Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-1,2,2,6,(and 7),8A-Pentamethyl-1-Naphthol

Reaction: ##STR91##

Into a 250 ml reaction flask equipped with stirrer, thermometer, reflux condenser and addition funnel is placed a mixture of 41 g (0.2 moles) of the mixture of ketones having the structures: ##STR92## prepared according to Example III, and 50 ml tetrahydrofuran.

Over a period of 15 minutes 100 ml of a 3 M solution of methylmagnesium chloride (0.3 moles) is added to the reaction mass while maintaining the reaction mass at a temperature of less than 30° C. The reaction mass is then stirred for a period of 5.5 hours at the end of which time the reaction is complete. The reaction mass is then added to a mixture of 50 ml acetic acid and 100 ml water. The aqueous layer is separated, and the organic layer is washed with saturated sodium chloride and saturated sodium bicarbonate solution, followed by saturated sodium chloride solution. The washed material is dried over anhydrous sodium sulfate and microdistilled yielding the following fractions:

    ______________________________________                                                  Vapor   Liquid            Weight of                                   Fraction Temp.   Temp.      mm/Hg  Fraction                                    No.      (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                        ______________________________________                                         1        98/99   115/115    0.7    4.6                                         2        95      115        0.7    4.7                                         3        96      116        0.7    3.5                                         4        96      116        0.7    2.5                                         5        97      125        0.7    6.5                                         6        97      170        0.7    6.9                                         7        90      185        0.7    0.3                                         ______________________________________                                    

The yield is 50%. The reaction product containing compounds having the structures: ##STR93## is confirmed to have these structures by means of NMR, IR and mass spectral analysis.

EXAMPLE XIV Preparation of 1,2,3,4,4A,5,8,8A-Octahydro-1,2,2,8(and 5),8A-Pentamethyl-1-Naphthol

Reaction: ##STR94##

In a 1000 cc reaction flask equipped with stirrer, condenser, thermometer and dropping funnel is placed 687 cc (1.10 moles) of a methyllithium (1.6 M) in diethyl ether solution. The methyllithium solution is cooled to 10° C. While maintaining the reaction mass at 10°-15° C., dropwise, 114.0 g (0.55 moles) of the mixture of ketones having the structures: ##STR95## prepared according to Example VIA is added. After addition, IR analysis and GLC analysis indicates that none of the starting material remains.

The resulting organometallic compound is then hydrolyzed with 100 cc of water. The organic phase is separated from the aqueous phase and the organic phase is dried over anhydrous magnesium sulfate, stripped of solvent and distilled on a 12 inch stone-packed column to yield the following fractions:

    ______________________________________                                                  Vapor   Liquid            Weight of                                   Fraction Temp.   Temp.      mm/Hg  Fraction                                    No.      (°C.)                                                                           (°C.)                                                                              Pressure                                                                              (g.)                                        ______________________________________                                         1        65/110  120/130    1.0/0.8                                                                                4.0                                        2        120     135        0.8    10.0                                        3        120     140        0.8    24.0                                        4        120     145        0.8    42.0                                        ______________________________________                                    

The yield is 80.0 g, which represents 65% of theory.

NMR, IR and mass spectral analysis yield the information that the reaction product contains two compounds having the structures: ##STR96##

EXAMPLE XV Preparation of Decahydro-1,2,2,8A-Tetramethyl-1-Naphthol

Reaction: ##STR97##

The alcohol (54 g) produced according to Example XII having the structure: ##STR98## and 100 g of isopropyl alcohol and 0.05 g of a 10% palladium on carbon hydrogenation catalyst are placed in an autoclave.

Over a period of 2 days, while maintaining the hydrogenation pressure of 37-50 psig at a temperature of 25° C., hydrogen is admixed with the reaction mass in a close system.

At the end of this time period the autoclave is opened and the contents are filtered. The reaction product is stripped of solvent and dried over anhydrous magnesium sulfate and then distilled on a 12 inch stone-packed column to yield a compound (52 g (96% yield), b.p. 120° C./0.8 mmHg), as confirmed by NMR, IR and mass spectral analysis to have the structure: ##STR99##

EXAMPLE XVI Preparation of Decahydro-1,2,2,6,(and 7),8A-Pentamethyl-1-Naphthol

Reaction: ##STR100##

Into a 2000 cc reaction flask equipped with stirrer, condenser, thermometer and dropping funnel is placed 680 cc (2.04 moles) of methylmagnesium chloride (3 M) in a tetrahydrofuran solution. Dropwise allowing a slow exotherm, 170 g (0.82 moles) of the mixture of ketones having the structures: ##STR101## prepared according to Example IV, is added to the reaction mass. After addition, the reaction mass is refluxed for 16 hours while being monitored by GLC analysis in order to ascertain completion.

The reaction mass is then hydrolyzed with 200 cc of saturated ammonium chloride solution. The resulting hydrolyzed material is then extracted with two 100 cc portions of toluene. The toluene extract is stripped of toluene and distilled to yield the following fractions:

    ______________________________________                                                  Vapor    Liquid            Weight of                                  Fraction Temp.    Temp.      mm/Hg  Fraction                                   No.      (°C.)                                                                            (°C.)                                                                              Pressure                                                                              (g.)                                       ______________________________________                                         1        120/120  127/130    0.9/0.9                                                                               10.0                                       2        120      130        0.8    38.0                                       3        125      135        0.8    37.0                                       4        125      140        0.8    32.0                                       5        125      180        0.8    46.0                                       ______________________________________                                    

The yield is 138.5 g by GLC analysis which is 75.6% of theory.

GLC, IR and mass spectral analysis yield the information that the resulting product is a mixture of compounds having the structures: ##STR102##

EXAMPLE XVII Basic Oral Hygiene Flavor Formulation

The following basic oral hygiene flavor formulation is prepared:

    ______________________________________                                         Ingredients     Parts by Weight                                                ______________________________________                                         Peppermint oil  89.0                                                           Spearmint oil   2.0                                                            Clove oil       1.0                                                            Anethole        2.0                                                            Cardamon oil    0.1                                                            Wintergreen oil 5.0                                                            Cinnamic aldehye                                                                               0.9                                                            ______________________________________                                    

The basic oral hygiene flavor formulation is now divided into two parts. To the first part at the rate of 10% is added the methyl substituted oxobicyclo-4,4,0-decane derivatives prepared according to each of Examples II, X or XI. To the second part, nothing is added. The flavor with the flavors with the addition of the materials produced according to either of Examples II, X or XI have fresher minty/eucalyptol aroma and flavor characteristics with woody notes. Therefore, the flavors with the materials produced according to Examples II, X or XI are preferred by the bench panel. 

What is claimed is:
 1. A process for augmenting or enhancing the aroma or taste of a peppermint oil-based oral hygiene flavor composition comprising the step of adding to said flavor composition from about 0.01% up to about 15% based on the total weight of said flavoring composition of a composition of matter selected from the group consisting of:(i) a compound having the structure: ##STR103## (ii) a compound having the structure: ##STR104## (iii) a mixture of compounds having the structures: ##STR105##
 2. The process of claim 1 wherein the composition of matter added is the compound having the structure: ##STR106##
 3. The process of claim 1 wherein the composition of matter added is the compound having the structure: ##STR107##
 4. The process of claim 1 wherein the composition of matter added is a mixture of compounds having the structures: ##STR108## 